Thanks for reaching out.
Could you share your online store URL and let us know which collection you are attempting to add this under? As this context will help us have a better understanding of the issue that is occurring.
Looking forward to your response.
under collection there are two parts, one is stackable and the other one that we want to name it hand picks of 2021
the site wont allow us to do that .also when you open my site on the phone, It wont show that section at all.